Grafting, blending, and biodegradability of cellulose acetate

Guruprasad, K. H.; Shashidhara, G. M.

doi:10.1002/app.13386

Cited by 31 publications

(19 citation statements)

References 19 publications

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“…However, so far more attention has been put only in the graft products of original starch. [25][26][27][28] Compared with anionic or cationic graft copolymers, amphoteric absorbent polymers have potential salt-tolerant swelling character. 29 In the literature, no previous attempt appears to have been made to study the synthesis and the properties of graft copolymers of cationic starch (CAS) with acrylic acid.…”

Section: Introductionmentioning

confidence: 99%

Swelling and thermal behaviors of a starch‐based superabsorbent hydrogel with quaternary ammonium and carboxyl groups

Cao

Feng

et al. 2005

J of Applied Polymer Sci

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A starch-based superabsorbent hydrogel with quaternary ammonium and carboxyl groups is synthesized in aqueous solution. Various factors, including the initiator dose, the crosslinker dose, and the dose and the concentration of the acrylate monomer, as well as the polymerization temperature, are investigated in terms of the swelling in distilled water and in a 0.9% NaCl solution.Furthermore, the thermal degradation of the modified starch graft copolymer is studied under an air atmosphere.

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Section: Introductionmentioning

confidence: 99%

Swelling and thermal behaviors of a starch‐based superabsorbent hydrogel with quaternary ammonium and carboxyl groups

Cao

Feng

et al. 2005

J of Applied Polymer Sci

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“…Studies on radical grafting of CDA using e-caprolactone, L-lactide, methylacrylate, methylmethacrlate and others have also been reported, and some of these products were found to have thermal flow temperatures lower than 200°C. Thus, melt spinning is applicable to such grafted CDAs, although both grafted polymers and homopolymers are always formed in the reaction products (Warth et al 1997;Yoshioka et al 1999;Yoshioka and Shiraishi 2000;Wang et al 2003;Teramoto et al 2004a, b;Guruprasad and Shashidhara 2004). The introduction of new substituents having long alkyl chains into the residual hydroxyl groups of CDA is another alternative for obtaining chemical modifications of CDA.…”

Section: Introductionmentioning

confidence: 97%

Reactions between cellulose diacetate and alkenylsuccinic anhydrides and characterization of the reaction products

2007

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Cellulose diacetate (CDA) with degree of substitution (DS) of 2.4 was dissolved in dimethylsulfoxide and reacted with octadecenyl succinic anhydrides (OSAs) using 1-methylimidazole as a promoter. FT-IR and 1 H-NMR analysis of the reaction products revealed that half-esterification occurred on residual hydroxyl groups of CDA by OSA, providing CDA/octadecenyl succinic acid (OSAcid) half esters at yields of more than 90%. The effects of reaction time and temperature on DS of CDA/OSAcid esters were studied in detail. The higher the reaction temperature, the higher the esterification rate to form CDA/OSAcid half esters. The maximum DS values were 0.41 and 0.33 for CDA/n-OSAcid and CDA/i-OSAcid esters, respectively. The original X-ray diffraction pattern of CDA changed with the introduction of OSAcid substituents into CDA, and CDA/OSAcid esters seemed to have thermoplasticity, depending on DS and the chemical structure of the OSAcids. A soil-embedding test of films of CDA and CDA/OSAcid esters indicated that the CDA/OSAcid esters that were prepared maintained the biodegradability of the original CDA.

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“…Unfortunately, both natural polymers and aliphatic polyesters have several drawbacks. The first class consists of large stiff molecules that cannot be processed with the high efficiency and productivity of thermoplastic polymers 22–27. Natural polymers are also sensitive to heat as well as to moisture; their structure is complicated and depends on origin.…”

Section: Introductionmentioning

confidence: 99%

“…Because cellulose and wood is difficult to handle and modify, often cellulose acetate (CA) is used as a starting material for further modification. CA can be plasticized externally by various aliphatic and aromatic esters 23–25, 29–31. Unfortunately external plasticizers often migrate to the surface of the product, creating environmental and health hazards and leading to the continuous deterioration of properties.…”

Section: Introductionmentioning

confidence: 99%

Modification of cellulose acetate with oligomeric polycaprolactone by reactive processing: Efficiency, compatibility, and properties

Klébert

Nagy

Domján

et al. 2009

J of Applied Polymer Sci

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Oligomeric polycaprolactone (oPCL) was used for the modification of cellulose acetate by reactive processing in an internal mixer at 180 C, 50 rpm, 60 min reaction time, and 45 wt % caprolactone (CL) content. The product of the reaction was characterized by several analytical techniques and its mechanical properties were determined by dynamic mechanical thermal analysis and tensile testing. The synthesized oPCL contained small and large molecular weight components. The small molecular weight fraction plasticized cellulose acetate externally and helped fusion. Although composition and structure did not differ considerably from each other when CL monomer or polycaprolactone oligomer was used for modification, the grafting of a few long chains had considerable effect on some properties of the product. The large molecular weight chains attached to CA increased the viscosity of the melt considerably and resulted in larger deformability. oPCL homopolymer is not miscible with cellulose acetate and migrates to the surface of the polymer. Exuded polycaprolactone oligomers crystallize on the surface but can be removed very easily. More intense conditions may favor the grafting of long chains leading to polymers with advantageous properties.

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Grafting, blending, and biodegradability of cellulose acetate

Cited by 31 publications

References 19 publications

Swelling and thermal behaviors of a starch‐based superabsorbent hydrogel with quaternary ammonium and carboxyl groups

Swelling and thermal behaviors of a starch‐based superabsorbent hydrogel with quaternary ammonium and carboxyl groups

Reactions between cellulose diacetate and alkenylsuccinic anhydrides and characterization of the reaction products

Modification of cellulose acetate with oligomeric polycaprolactone by reactive processing: Efficiency, compatibility, and properties

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